Continuous form envelope



April 13, 1965 D. J. sTElDlNGl-:R

CONTINUOUS FORM ENVELOPE 4 Sheets-Sheet I1 Filed March 8, 1961 April 13, 1965 3,177,783

D. J. STEIDINGER CONTINUOUS FORM ENVELOPE Filed March 8, 1961 4 Sheets-Sheet 2 April 13, 1965 D. J. STEIDINGER CONTINUOUS FORM ENVELOPE Filed March 8. 1961 4 Sheets-Sheet 3 SSV @.mzl

oooooaaoooooolololooo PIN\ April 13, 1965 D. J. STEIDINGER CONTINUOUS FORM ENVELOPE 4 Sheets-Sheet 4 Filed March 8, 1961 United States Patent O 3,177,783 CONTINUOUS FRM ENVELOPE Donald J. Steidinger, Clarendon Hills, lll., assigner to Uarco Incorporated, a corporation oi Illinois Filed Mar. 8, 1961, Ser. No. 94,326 19 Claims. (Cl. 93-63) This invention relates to a method of forming a continuous form assembly of detachable envelopes and more particularly to a method which produces such a product from a single web of envelope material or paper.

Continuous form assemblies of detachable envelopes have been produced in the past, for example, see Patent No. 2,824,685 and my Patent No. 2,895,534. Both of these patents show assemblies of series-connected envelopes. However, it is apparent from their disclosures that these envelopes are not constructed from a single web material but are constructed from two webs of material. Obviously, it is desirable to be able to produce envelopes of this form from a single web material.

It is therefore an object of this invention to provide a method for forming a continuous form assembly of detachable envelopes from a single web of paper.

It is another object of this linvention to provide a method of forming a continuous form assembly of detachable envelopes from a single web of paper comprising the steps of die-cutting a web of envelope material at longitudinally spaced points to form elongated, longitudinally spaced, transversely extending ilaps which are adapted to be folded laterally across the web to deiine the back of an envelope having a poclrettherein, applying adhesive material along the envelope bottom deiining edge of the flaps and along the longitudinal edge of the flaps, folding the flaps across the web and joining them thereto in the areas bearing said adhesive and providing means for separating between adjacent individual envelopes to enable the envelopes to be readily detached from each other. j It is still another object of this invention to provide an envelope wherein the elongated, longitudinally spaced, transversely extending flaps are located in pairs on opposite sides of the web. Y

It is yet a further object of this invention to provide such an envelope `wherein each of the naps is scored at the area of connection between the aps and the web to provide a fold ilne.

It is still another object of this invention to provide such a method wherein adhesive is applied along the margin of the web adjacent the connecting area between the flaps and the web and the` continuous form is provided with regularly spaced apertures or line holes in the marginal portion of the web to facilitate the feed of the assembly through a business machine.

It is yet another object of this invention to provide such a method wherein lines of weakening are provided adjacent to but spaced inwardly from the spaced apertures or line holes for removal of the margins bearing the same after use. Y p

It is yet a further object of this invention to provide such a method wherein the web is provided with a plurality of pairsV of openings each located adjacent the margin of the web at a point substantially coinciding with the longitudinal spacing between said iiaps and defining therebetween an envelope top flap. i r

It is still another object of this invention to provid such a method wherein the top flap has beenprovided j "ice of the steps of the method of this invention with nurnbered boxes indicating the operation performed at each step and in each piece of equipment; j

FIGURES 2 through 8 are partial top plan views in varying sizes related by number to the boxes I-VII in FIGURE l and each showing the result of the operation performed on the web at that step of the process;

` FIGURE 9 is a perspective view in reduced size of a partially folded group of continuous form envelopes;

FIGURE 1() is a top plan view of an envelope of this invention;

FIGURE 11 is a sectional View taken along the line lll-11 of FIGURE 10;

FIGURE 12 is a sectional view taken along the line 12-12 of FIGURE 10; and

FIGURES 13 and 14 are perspective views from the back and front of a separated envelope of this invention.

Referring now to the drawings, FIGURE 1 as previously pointed out, is `a diagrammatic layout of the steps of this invention. The order shown in FIGURE 1 is not necessarily the order in which the steps must be accomplished, as will be apparent through the description of the method of this invention. Each of the numbered boxes shown in FIGURE 1 identifies a step being performed and for clarity of description, the steps will be described in this order and related to FIGURES 2 through 8 which show the results of the steps. It must be pointed out iirst of all, that the continuous form envelopes of this invention are produced by a method which allows the use of a single web of paper. As can be seen clearly in FIGURE 1, a single roll 10 of paper or other envelope material is mounted at a position corresponding to the beginning of an assembly line and feeds a single web 11 of paper into the rst step. This same web`11 passes through the Whole process.

Step I shown in the process of FIGURE 1 is that of printing on the envelope. As can be seen in FIGURE 2, the web 11 after passing through theprinter 12 has irnposed on what will be the face of the envelope the name 13 of the company or user. Obviously', of course, this printed step could be accomplished at almost any time during the process of this invention.

At Step II, the top Hap gum or adhesive` 14`of the envelope is applied and dried by means of an adhesive applicator 15. The adhesive used is one which on moistening will seal the envelope. t

The web of paper 11 next passes to Step III which involves the punching of side panels or aps 16 and 17.

The score `line 18 is also provided on which the iiaps 16 and 17 can be folded. This operation is performed in a punch mechanism 19 which` imposes a plurality of punches or cuts on the continuous web 11. Thus punches are made along the lines 20a, Ztlb and 20c to define one side of two side flaps 16, and along the lines 21a, 2lb and 21C to define one side oftwo side tiaps 17. At the same time, the web is `scored at 18 `which is substantially the area of connection between the side flaps 16 and 17, and the main web to provide a fold on which the ilaps 16 and 17 may be` laterally folded to define the envelope back. ,It will `be noted that fiap I6 is substantially shorter than flap 17. `This provides an offset` connection at 22 between the flaps as the envelope is formed (see FIG- URE 14). The purpose of the offset aps is to make possible a penny saver end flap which can be opened for postal inspection. This feature would allow mail to be sent with one cent less postage.` In order to provide the penny saver end flap, the envelope is constructed the same as shown inthe drawings and as described with` theexception ofthe glue pattern on the short flap at 15a and 16h. One or two small spots of glue (not shown) 1 are substituted for `the lines of glue 15a and 16b so that a postal inspector can pull out the short. iiap 16inspect Y envelope.

1.9 the contents, restul them and push in the flap. The line ofrglue 23 remains the same to form a strong seal on that side.

The web next moves to Step IV during which glue is applied to the side panels or ilaps 16 and 17 by a glue applicator 24. In FIGURE 5, it can be seen that glue is applied along the bottom 16a and 17a of the llaps 16 and 17. This is the area which will define the bottom of the Glue is also applied along the longitudinal side edge lieb of the liap 16. Additionally, strips 23 or" glue are applied along the web at a point adjacent the connection between the flaps 16 and 17, and the web 11. The strips 23 of glue are continuously extending even along the portion of the vweb between the flaps 16 and 17. This glue is normally a conventional liquid glue which'dries rather quickly on standing and is applied in a conventional glue applicator 24.

After leaving the glue applicator 24 in Step lV, the web 11 passes into side panel folding and drying, Step V, which involves the use of a piece of equipment 25 designed Vfor this purpose. During this step, as can be seen in FIGURE 6, the side panels 16 and 17 are folded over and joined together by the adhesive strips 16h and are adhered along the bottom of the envelope by the strips 16a and 17 b. The adhesive 23 is also joined to the end portions 11a and 11b of the web 11 to facilitate the later addition of line holes.` The adhesive is dried in the same step so that a sturdy construction results.

The web 11 next passes into Step VI wherein a device 26 punches flap holes 27 which define a top ilap 30 and provides scores 28 between adjacent envelopes. The scores 23 are lines of weakening which allow the envelopes to be separated after passing through a business machine. In this same step a crease 29 is provided adjacent the top a'p 20 on which the flap is folded after the contents of the envelope are placed therein. Line holes 32 which are .used to guide the forms through a business machine are also added during this step.

In Step VII which is performed by a scoring mechanisrn and-side trimming machine 31, the edges 33 are trimmed to cutaway unnecessary envelope forming material, and the lines of weakening 35 are added. These facilitate removal of the margins bearing the line holes 32 after the envelopes have been used in a business maconstruction, looks very much like singly made enve- The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitatiorlsushould be understood therefrom for some modiications will be obvious to those skilled in the art.

I claim: v v

1. A method of forming aV continuous form assembly of detachable,envelopesvfrom a single web of paper,

. comprising the steps of: diejcutting aV web of envelope Y material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending flaps which are adapted to, be folded laterally across said web to define the back of an envelopehaving a pocket therein; applying adhesive material'along the envelope bottom defining edge of said ilapsand alongthe longitudinal edgeof at least some of saidaps; folding said ilapsacross said web and joining themthereto and together in the areas bearingrsaid adhesive; and providing means for separating between acljacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like.

2. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form oppositely located pairs of elongated, longitudinally spaced, transversely extending flaps, each pair of which is adapted to be folded laterally across said web to define the back of an envelope having a pocketV therein; applying adhesive material along the envelope bottom defining edge of'said iiaps and along the longitudinal edge of one of the iiaps in each pair; folding said fiaps across said web and joining them thereto and together in the areas bearing said adhesive; and providing means for separating between adjacent individual enve lopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like.

3. The method of claim 2 where one member of said` pair of liaps is longer than the other member.

4. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending iaps which are adapted to be folded laterally across said web to deline the back of an envelope having a pocket therein; scoring each ofL said llaps at the area of connection between said ilapsand said web to provide a fold line; applying adhesive material along the envelope bottom deiining edge of said iiaps and along the longitudinal edge of at least some Y of said flaps; folding said aps across said web on said Y fold line and joining them to said web and together in the areas bearing said adhesive; and providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like.

5. A method ofY forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: diecutting a web of envelope material at llongitudinally spaced points along both edges of said web to form oppositely located pairs of elongated,

longitudinally spaced, transversely extending flaps, each pair of which is adapted to be folded laterally across said web to detine the back of an envelope having a in continuous form machinery and the like.

6. A method of forming a continuous formVV assembly of detachable envelopes from a single web of paper,V comprising the steps of: die-cutting a web of envelopeV material at longitudinally spaced points along both edges of'said web to form elongated,` longitudinally spaced,

Vtransversely extending flaps which are adapted tok be *y folded laterally across said web to define the back of an envelope having a pocket therein; applying adhesive material along the envelope bottom detining edge kof said aps, along the longitudinal edge of'said llaps and Yalong the margins orfsaid web kadjacent the connecting areabetween said flaps and said web; folding said'aps across said web yand joining them thereto and together in the areas bearing said adhesive; providing meansV for' separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; and providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine.

7. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form oppositely located pairs of elongated, longitudinally spaced, transversely extending iiaps, each pair of which is adapted to be folded laterally across said web to define the back of an envelope having a pocket therebetween; applying adhesive material along the envelope bottom deiining edge of said flaps, along the longitudinal edge of said ilaps and along the margins 0f said web adjacent the connecting area between said flaps and said web; folding said lapsracross said web and joining them thereto and together in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; and providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine.

8. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope 3 material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to define the back of an envelope having a pocket therein; scoring each of said liaps at the area of connection between said flaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said iiaps, along the longitudinal edge of said ilaps and along the margins of said web adjacent the connecting area between said flaps and said web; folding said flaps across said web on said fold line and joining them to said web and together in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; and providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine.

9. A method of forming a continuous form assembly yof detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form oppositely located `pairs of elongated, longitudinally spaced, transversely extending aps, each pair of which is adaptedV to be folded laterally across said web to deiine the back of an envelope having a pocket therein; scoring each of said flaps at the area of connection between said flaps and said web to provide a fold line; applying adhesive` material along the envelope bottom defining edge 'of said flaps, along the longitudinal edge of said iiaps and along the margins of said `web adjacent the connecting area between said flaps and said web; folding said aps across said web on said fold line and joining them to said web `and together inthe areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery `and the like; and providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business rnacnine.`` p,

l0. A method of forming Va continuous form assembly of detachable envelopes from a single webof paper, com- 6 prising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges `of said web to form oppositely located pairs of elongated, longitudinally spaced, transversely extending flaps, each pair of which is adapted to be folded laterally across said web to deiine the back of an envelope having a pocket therein; scoring each of said iiaps at the area of connection between said iiaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said iiaps, along the longitudinal edge of said iiaps and along the margins of said web adjacent the connecting area between said liaps and said web; folding said flaps across said web on said fold line and joining them to said web and together in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine; and providing lines of weakening adjacent but spaced inwardly from said spaced apertures for removal of the margins bearing the same after use.

1l. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: diecutting a web of envelope material at longitudinally spaced points to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to deiine the back of an envelope having a pocket therein; applying adhesive material along the envelope bottom deiining edge of said flaps and along the longitudinal edge of said flaps; folding said liaps across said web and joining them thereto in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; and providing a plurality of pairs of openings in said web, each opening of said pair being located adjacent the margin of said `web at a point substantially coinciding with the longitudinal spacing between said flaps and defining therebetween an envelope top flap.

l2. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to deiine the back of an envelope having a pocket therein; applying adhesive material along the envelope bottoni defining edge of said iiaps and along the longitudinal edge of at least some of said flaps; folding said iiaps across said web and joining them thereto and together in the areas bearing said adhesive; providi ing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached" from each other after use in continuous form machinery and the like; and providing a plurality of pairs of openings in said web, each opening of said pair being located adjacent the margin thereofat a point substantially coinciding with `the longitudinal spacing between said flaps and defining therebetween an envelope top flap.

13. A method of forming a continuous form assemblyof detachable envelopes from a single webof paper, comf prising the steps of: die-cutting a web of envelope material at longitudinally'spaced points along both edges of i said web to form oppositely located pairs of elongated, longitudinally spaced, transversely extending flaps, each `pair of which is adapted to be folded laterally `across said web to deiine the back of an envelope having a pocket therein; applying adhesive material along the envelope bottom defining edge of saidfiiaps and along the longitudi- 1 nal edge `ofione of thefiaps` in each pair; foldingfsaid` ,i flaps across saidweb and joining them thereto and tokthrough a business machine;

gether in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; and providing a plurality of pairs of openings in said web, each opening in said pair being located adjacent the margin of said web at a point substantially coinciding with the longitudinal spacing between said iiaps and defining therebetween an envelope top flap.

14. A method of forming a continuous form assembly of detachable envelopes from a single Web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points to form elongated, longitudinally spaced, transversely extending liaps which are adapted to be folded laterally across said web to define the back of an envelopek having a pocket therein; scoring each of said flaps at the area of connection between said flaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said flaps, along the longitudinal edge of said flaps and along the margin Vof said web adjacent the connecting area between said liaps and said web; folding said aps across said web on said fold lines and joining them to said web in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine; and providing a plurality of pairs of openings in said web, each opening of a pair being located adjacent the margin thereof at a point substantiallyfcoinciding with the longitudinal spacing between said iiaps and defining therebetween an envelope top flap.

15. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to define the back of an envelope having a pocket therein; scoring each of said iaps at the area of connection between said fiaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said iaps, along the longitudinal edge of some of said liaps and along the margins of said weby adjacent the connecting area between said flaps and said web; folding said flaps across said web on said fold line and joining them to said web and together in the areas bearing said adhesive; providing means for separating ybetween adjacent individual envelopes to enable -sai`rl envelopes to be readily detached from each other after use in continuous form machinery and the like; providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly and providing a plurality of each opening of a pair being thereof at a point substanpairsof openings in said web, located Vadjacent the margin tially coinciding with 'the longitudinal spacing between said iiaps and defining therebetween an envelope top flap.

16. A method of forming a continuous form assembly .of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelopelmaterial at longitudinally spaced points along both edges of said lweb to form oppositely located pairs of elongated, longitudinally spaced, transversely extending flaps, each pair of which is adapted to be folded laterally across said rweb to define the back Vof an enveloperhaving a pocket therein; scoring'each of said iiaps at the area of connection between; said iiaps.4 and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said iaps, along the longitudinal edge of one of said flaps in each pair and along the mar- .gins'of said web adjacent the connecting area between said flaps and 4said web; foldingfsaid iiaps vacross said web on said fold line and joining them to said web and'tofor separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery andthe like; providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine; and lproviding a plurality of pairs of openings in said web, each opening of a pair located adjacent the margin thereof at a point substantially coinciding with the longitudinal spacing between said iiaps and defining therebetween an envelope top fiap,

17. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope material at lonitudinally spaced points to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to dene the back of an envelope having a pocket therein; scoring each of said flaps at the area of connection between said flaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said flaps, along the longitudinal edge of said flaps and along the margin of said web adjacent the connecting area between said flaps and said web; folding said flaps across said web on said fold line and joining them to said web in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; providing regularly spaced apertures in the marginal portion of said web to facilitate the feed of the assembly through a business machine; providing a piurality of pairs of openings in said web, each opening in a pair being located adjacent the margin of said web at a point substantially coinciding with the longitudinal spaing between said flaps and defining therebetween an envelope top flap; and providing a strip of adhesivek on said top flap and a folding crease between said top flap and said envelope face.

' 18. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of die-cutting a web of envelope material at longitudinally spaced points along both edges of said web to form elongated, longitudinally spaced, transversely extending flaps which are adapted to be folded laterally across said web to define the back of an envelope having a pocket therein; scoring each of said iiaps at the area of connection between said iaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said flaps, along the longitudinal edge of said flaps and along the margins of said web adjacent the connecting area between said flaps and said web; folding said tiaps across said web on said fold line and joining them to said web and together in the areas bearing said adhesive; providing means for separating be- Y iining therebetween an envelope top flap; and providing a tween said top fiap andsaid envelope face. e

19. A method of forming a continuous form assembly of detachable envelopes from a single web of paper, comprising the steps of: die-cutting a web of envelope mastrip of adhesive on said top flap and a folding crease be- V terial at longitudinally spaced points along both edges of Y said web to form oppositely located pairs of elongated, longitudinally spaced, transversely'extendingflaps, each pairof which -is adapted to be folded laterally across 4said web to define the back of an envelope having a pocket therein; scoring each of said aps at the area of connection between said flaps and said web to provide a fold line; applying adhesive material along the envelope bottom defining edge of said flaps, along the longitudinal edge of said flaps and along the margins of said web adjacent the connecting area between said flaps and said web; folding said tlaps across said web on said fold line and joining them to said web and together in the areas bearing said adhesive; providing means for separating between adjacent individual envelopes to enable said envelopes to be readily detached from each other after use in continuous form machinery and the like; providing regularly spaced apertures in the marginal portion of said Web to facilitate the feed of the assembly through a business machine; providing a plurality of pairs of openings in said web, each opening of a pair being located adjacent the margin thereof at a point substantially coinciding with the longil@ tudinal spacing between said flaps and defining therebetween an envelope top ap; and providing a strip of adhesive on said top flap and a folding crease between said top ap and said envelope face.

Reierences Cited by the Examiner UNITED STATES PATENTS FQANK E. BAILEY, Primary Examiner.

FRANK H. BRONAUGH, Examiner.

shea et a1 93463 

1. A METHOD OF FORMING A CONTINUOUS FORM ASSEMBLY OF DETACHABLE ENVELOPES FROM A SINGLE WEB OF PAPER, COMPRISING THE STEPS OF: DIE-CUTTING A WEB OF ENVELOPE MATERIAL AT LONGITUDINALLY SPACED POINTS ALONG BOTH EDGES OF SAID WEB TO FORM ELONGATED, LONGITUDINALLY SPACED, TRANSVERSELY EXTENDING FLAPS WHICH ARE ADAPTED TO BE FOLDED LATERALLY ACROSS SAID WEB TO DEFINE THE BACK OF AN ENVELOPE HAVING A POCKET THEREIN; APPLYING ADHESIVE MATERIAL ALONG THE ENVELOPE BOTTOM DEFINING EDGE OF SAID FLAPS AND ALONG THE LONGITUDINAL EDGE OF AT LEAST SOME OF SAID FLAPS; FOLDING SAID FLAPS ACROSS SAID WEB AND JOINING THEM THERETO AND TOGETHER IN THE AREAS BEARING SAID ADHESIVE; AND PROVIDING MEANS FOR SEPARATING BETWEEN ADJACENT INDIVIDUAL ENVELOPES TO ENABLE SAID ENVELOPES TO BE READILY DETACHED FROM EACH OTHER AFTER USE IN CONTINUOUS FORM MACHINERY AND THE LIKE. 